Serratia InfectionsSerratia marcescensBacteremiaProdigiosinAnti-Bacterial AgentsGram-Negative Bacterial InfectionsSepsisSerratiaCross InfectionStaphylococcal InfectionsEnterobacteriaceae InfectionsMicrobial Sensitivity TestsGram-Positive Bacterial InfectionsGram-Negative BacteriaBloodEnterobacteriaceaeChitinase